"Carlton Zink (Director 1930-1940) employed a number of students at the lab as assistants. This is Clee Smiley, who worked at Waterloo for J.D." He is using a Planimeter to check the trace on a chart from the Drawbar Test Dynamometer.

Carlton and three technicians. We believe that Harold Mizner and Don Wielage are the ones whose faces can be seen. Mizner and Wielage worked for J.D. at Waterloo (and were observing the test and looking at the data - Ed)."